In machines foe boeing bobbins



'uitrit tatie @anni @ffice IMPROVEMENT IN MGHINES POB. BORING BOBBINS.

titte tteinle mimi tr in ligen itfet @erfreut mit making pitt nf the mit.

TO WHOM IT MAY CONCERN:

Y Beit known that IRVERTOT D. BEACH', of Battle Greek, inthe county of Calhoun, and State of Michigan,

have invented a new Machine for Boring 'Bobbinsj and I do declare that thc following is an accurate description thereof, reference being had to the accompanying drawing and the letters of reference marked thereon,

and being part of this specification.

Figure 1 is a perspective view of the machine. Figure 2 is a top view of the mandrel. Y Figure 8 is an end view of the .bit-holder.

Figure 4is a vertical sectional view of the same.

The same letters refer to the same parts of the machine in all the figures, 1, 2, 3, and 4.

This invention is designed for the purpose of boring bobbins or any other article of wood where a conical bore is desired. Upon a proper lathe-i`rame I erect a hollow mandrel, A, attached to the pulley B, upon which runs it belt to give power and motion. This 'mandrel A is constructed with a conical bore for the purpose of containing the piece of wood to'be bored. This piece of: wood revolving with the mandrel A at a high 'rate-.of speed, the stationary bit (hereinafter described) will follow the centre of motion in said piece of wood, and

thereby produce a perfect bore. This mandrel A is constructed in two parts, as shown in the drawing, so that `the part S may be withdrawn and a longer one subs`titutcd,i`or thc purpose of holding a longer .piece of wood.

C is an oil-cup, containing a brush, which protrudes through the bottom, and oils each of the stationary bits `before they are forced into the wood to be bored, which prevents clomrinff. The outside of the mandrel Ais CD C! made with sectional bearings, as at T in iig. 2, which bearingsare fitted to steps or shoulders in the journal box V. At w, in fig. 2, is left a small orifice for the discharge of chips. The entire mandrelhead"is so con-x structed that it can be moved backwards and forwards upon the frame, as may berequiredby different lengths of pieces of wood to be bored. The revolving bit-holder D is made of a cylindrical casting, as in fig. 3, attached by arms to m m to the Aslides n n. On'top ofthe slides-n 'n' are placed the light shields F F, to prevent chips or dust from settling upon the ways c v', upon which the slidcs'run. E E are thumb-pieces or hand-rests, with which the operator moves his bit-holder forward or back, as occasion may require. This revolving bit-holder Dhas a chamber, as at c c', iig. 4, which holds the clasps dal', that attach the bits to the inside of the revolving Vbit-holder D.) These bits are of diii'erent sizes and lengths, as may be required for the diii'erent-articles to be bored. There are ive bits and clasps c c', each of a different size and length, and they are attached to the `revolving bit-holder at h', &c., iig. 3. At c c,'&:c., is placed a nut, to tighten up the stcmof the clasps c c Y boring-bits.

2. The revolving bit-holder D, constructed and arranged to operate substantially as and for the purpose whichsteni passes through the shell of the bit-holder D. H, in fig. 1, is a dog, placed under the thumb-piece E, and acts upon the armK, when the slides n fn are drawn back. The dog H, forcing the arm K back, turns the rock-shaft @which is connected to the levers R R byfthe links I I. When thc arm K is thus forced back, the

levers R R are raised". v To the levers R R' are attached the rods MN. On the top of the rod N is attached a hook,`W, that catches upon the bar `tl. Upon the top of this bar v is a stop, 5, which catches in the slots a a,

c., to hold the revolving bitholder firm and steady, while the bits are being forced through the piece of wood to be bored. On drawing back the revolving bit-holder D, the hook w catches upon the bar i) and releases the stop 5, and at the saine instant, another hook, 6, upon the end of rod M, catches kin the openings L z, Ste., and revolves the bit-holder just one-fifth of a revolution, when the stop 5 stops it by entering again in the slot a, when the bit-holder is again ready to be moved up to force the next bit into thcpiece of wood to be bored, 7 is a-leaf-spring, which holds the rod M in place while the hook 6 is acting upon the bitholder D.A L L are semielliptic springs fastened to the bridge 8, and act upon the leversIi- R, to throw them down instantaneously, and compel the hooks w and 6 to accomplish theirwvork. 9 arc nuts upon the rod M, to preventits being thrown too high to allow the hook 6 to readily enter'- the openings h. P is a short spiral spring, which allows the lever R full` play after the rod has been raised to its proper pgsition. 10 is an elliptic spring attached to the crossbnr 12, which holds the bar 1: to its place.

What I claim asmy invention, and desire to secure by Letters Patent, is-

1. The use of the yoil-cup C, with the brush as described, for the purpose of oiling the reciprocating.

y specified.

3. The arrangement of the dog H, the semi-elliptic springs L L, thel levers R, the'rods M N, the hooks w `and 6, the leaf-spring 7, the 4har t', and the stop s,A the links I I, the nuts 9, and the spiral spring P, arranged Ind operating substantially as and for the purposes specied.

VERTOT D. BEACH.,

Witnesses:

H. F EBERTS; R. J. Ensure. 

